Lock



March 1 0, 1931 N. B. H4URD LOCK 2 Sheets-Shed 1 Filed April 23, 1930 w: 11 wmmmwwww mm mmim i ATTORNEYS.

March 10, 1931. N. B. HURD 1, 5,85

LOCK

Filed April 23 1950 2 Sheets-Sheet 2 INVE'NTOR ATTORNEYS .c Bing certain new improved .41 trolling aid lever; I

5 the outer dee knob 11 Patented Mar. 10, 1931 npplicatio'n filed April 23,

'llhis invention relates to locks and latches and particularly to locks in: which the latch- ]oolt performs the double function ofalatchbelt and' aideadbolt; "It" consists in provid- I operating and dead-locking inechanism for. the latch bolt. I fIt is the object iot thei'nventio n to provide a relatively simple, inexpensive, durable, and

eficient operating and dead-locking'mecha- :1 nism for-the latch-bolt? :In the accompanyingdrawings V Fig;- 1' is a sideyview of a lock embodying fmy invention "with the plate of the case I removed;

:15; sFi gfQ is a-simil'ar-vi'ewshowing the operating parts ina different position andwith j -pa-rt otthe cap in placeq 'eIrSnbStantiaHy a; ipflanethrough the axis of lock as installedona:door;'1 I I E ig; 4=jis a perspective view ioiythe latch -actuatingandi-dogging'lever; I: v j- Fig. 5 is a similar view of ahubgforc0n-' t hfel door jknobs', -this view also showingthe 7 "Figlfi isfa' -similar view ofithe tail end of [the latch-bolt: 1 5 1 In the drawings,whichIshowa preferred form of my invention, 5 indicates avlofck case.

' 430 *5 is a {removable cap theretor. 6 indicates part 'ot a door tomhich the' lock is applied.

.7 indicates the usua'i spring latch-bolt hav- I "mg aitailspindIe-Scarryingatitssre'ar end a specially fo'rmed tail-piece i 9,

the :latter hav- P 135 ihafa forward extens on which carries a stop s'htoulder 22. 1' 110is=theusual 'latch spring. flhe lock 'is provided with the customary 'insi'deand outside door knobs, or other manual latch operating means,:whereby-ithe latch 7 l 9 [may -be' retractedin the well known manner mechanism indlcated "fbyfthe usual .---ro1l-back generally at 151. "The lock.isalso provided with anywellknown form of stop 'work {mechanism fshown generally at 11, whereby may beiidogged as shown in Fig, togpreventretraction o "the latch 7 the'reby, These flatchfiretracing and stop work'-rnechanisms are so fully illustrated and so "old and well :known Zas to 0 require no detai1cddescr1ptioh.' 12 isa lever "said lever is' turned tionshown in Fig. 1" 1t .Wlll retract xsaid latch,

and ful ly' described sucha' cylinder my former Patent *No. 1,703,845, of February vditions, a tpass? key may so :that the roll-back16 beit i encounters the 19 30; Serial ar 446,436.

pivoted at 13-fon The lower end 1410f this the wall er the as *5. leverstands in vfront NORMAN 3. um), orfnnwmeron, cbnn cricu'r, lissicnon o THE 4 413 10431 J eeenwass weizqeemomor ,N 3 x 1 Q NNE' U A C B HATUQN F of the itail-piece 9 0i the latch so'that when clockwise from the posi- Whereas when-said lever isturned to, and i :held in,Jthe-position shown in'Fig, 2, it will stand behind" the shoulder 22 ofthe latch.

tailpiece 9; and block or dog the latch-bolt against repression or retraction. 15is "a cylilnder lock, theplug'ofwhich carries a roll -back16'. "This cylinder lock is so constructed that when operated by the ordinary key, -sometimes-termed artpass key, it willhave only-a :li inited turning. movement," whereas,

when operated by? qspecial key, sometimes memes an emergency ikemit will haveiun- I have shown,

lock in limited turning movement.

key. actuated 26,1929. Suffice it tosay in thez'pre'sent case t that the roll-backl 6 carries ,a v

vslide bearinga lug 24.- which normally stands vas shown inrF ig.,-1 so that the rotation of p limited by said lug 24 .stri-kinga 'ainst one or the other oftwo fixed .stops28fl25' on the rear of the cylinder;

ilvhen tlie outer knob 11 is dogged as shown in Fig.1, it'requiresa'key to operate the latch tromthfe'outdcor side.

be inserted in the cylinder lock turned; in acounter-clo'ckwise direction until upperendot the lever. 12, whereup on by a slight continued rotation" o the lever will be turned inra clockwise direcitlOl'l :tdretract the function mayfalso be performed by the use of ia-special for e1nergency key.. Now, as-- lsulnin'g it is I the ioutside so that it cannot be opened vby the outer knob or byJ-the useof a/pass key, I

desirable t'olock the door from ,thispevent, the ,emergencyt key is employed which displaces vthe ,slide :so; as to ;When such a-ke'y is used,

itlie'sroll back. :16may be turned in a clock .Under' normal con 11x85v i said key and roll-back inthe same direction latch-bolt 7-. 'VThiss ame wise direction, as viewed in Figs. 1 and 2, to

. cause the hub 17 and the lever 12 to be shifted to the position shown in Fig. 2, wherein its lower end will stand directly behind the stop shoulder 22 on the latch-bolt tail so that, so

long as the lever 12 is held in this position, the latch 7 cannot be repressed or retracted by anything. This movement to, and holding of, the lever 12 in the dead-locking position is tion shown in Fig.2. On this movement the drawings.

WVhen the lever 12 stands hub engages and rocks the, lever 12 .to the position shown in Fig. 2, wherein the end of the horn 21.stands under aflshoulder formed by the laterally projectingarm 14 of the lever 12, which horn end'positively blocks the lever against movement from its latch dogging position shown-in Fig. 2. A spring 20*bearing on one side or the other of a hump 19 on the hub resiliently holds the hub 17 in either of the two positions shown in the 18 isa thumb turn at the indoor lock for oscillatingthe hub 17. in the latch doggmgposition shown in Fig. 2*it is apparent that, even though the roll-back 16 maybe side of the given a limited turning movement by the use of a pass key, theend of said roll-back cannot reach the lever 12, and consequently the latch cannot be retractedthereby. Furthermore, since the roll-back 16 cannot be turned by the pass key beyond the-stops 23+25, the hub 17 cannot be operated to release'the latch by the pass key. To reverse the hub17 from' the outdoor side of the lock, the emergency key is employed and turned in a counter-clockwise direction until the roll-back 16 engages the horn 26 of the hub 17, whereupon by a continued rotation of said key the hub 17 is rocked back to the position shown in Fig. 1 and the lever 12 is restored to the position On this rockingmovement, the lower end of the hub 17 presses against the lever 12 in a direction to restore said lever to its latch actuating position shown in Fig. 1.

From 7 the foregoing, it appears that whether the stop work 11' is on or off, the holder of an emergency key can set the latch actuating and dogging lever 12 in the position shown in Fig. 2 to prevent retrac tion ofthe latch-bolt by the outer knob or by a pass key. .So, also, the user of a room protected by the lock can set the lever 12 by the use of the thumb turn 18 so that retraction of the latch 7 from the outside will be prevented excepting by the use of an emergency key. If the stop work 11 v is on as shown in Fig. 1, the holder of a'pass key accomplished through the medium of afhub said latch. I V, v

3. In a lock, a lockcase, a latch,,a latch shown in said figure,

- from the scope of this invention as defined in the appended claims.

I claim: j

1. In a lock, a lock case,a latch, a latch lever pivoted to said case for actuating the latch, key actuated means for shifting such latch lever forla-tch retracting purposes, and means operable from the inside of a door for blocking said latch lever against movement to prevent the retraction of said latch thereby.

2. In a lock, a lockcasing, a latch,-a latch lever latch, and means operable from the inside or" a door for shifting said latch lever and blocking the same to prevent retraction of actuator pivoted to said case, key'operable "means for'm'oving said latch actuator'for retracting said latch, and means-operable from the inside of the door for shifting'said latch actuator out of the path of said'key actuated means; 1' V i 4. In a look, a lock case, a latch, a latch lever, key actuated means for engaging said latch lever to retract said latch, and means for shifting said latchleverout of the path of said key actuated means and blocking said latch lever against movement in 'sjuch latter position, whereby said-latch will be deadlocked.

5. In a lock, a lock case, a latch, a latchlever pivoted to said 'case,'keyoperable means for normally moving said latch lever into position for latch retracting purposes, a hub in said latchcase, a manual actuator for such hub, saidhub. being'mov'able by said manualactuator 'to shiftand hold said latch lever in latch dead locking position; i V

6: In a look, a lock case, a latch, a latch lever pivoted on the-case for retracting the latch, manual means operable from the in-'-' door side of the lock for dogging said-latch,

key operable means operable by means ofan emergency key'for shifting said manually operablemean's so as to undog said latch. V 7. In a lock,'a lock case, a latch, alatch lactuato'r pivoted to said case, key operable means normally operable by means of one key to operate said latchactuator for latch retracting purposes, means operable from the inside of the door for dogging said latch and rendering the key operable means inoperative to retract said latch with saidkey,

but operative by a different key to undog said latch. and retract the same.

8. In a'lock, alockcase, a latch, a latch latch may be retracted by actuator manually operable means of an emergency key actuator, key operable means for normally moving said actuator to retractsaid latch, means for limiting the rotation of said key operable means by means of one key, means 9. In a look, a lock case,

of a door, means for for dead-locking said latch, and key operable meansto be actuated from the outside of a door for undogging said latch actuator by only.

10. In a lock, a lock case, a latch, a pivotally mounted latch lever, a cylinder lock having a roll-back for normal engagement with said latch lever for shifting the same to retract said latch, means for limiting the rotation of said roll-back, and'means operable from the inside of a door for shifting said latch lever out of the-path of said rollback.

11. In a look, a lock case,'a latch, a latch lever pivoted on. the case for actuating the latch, a cylinder lock having a roll back for latch retracting means at trolled means being operable mit motion from the with means interposed between said key controlled means and said lever to'transmit motion from the former to the latter by the use of said last mentioned key.

15. In a door look, a case, a latch, manual the outdoor side of said lock, stop work mechanism for said means, a combined latch actuating and dog- If ging lever pivoted to said case, a key controlled means operable by either one of two diiferent keys for swinging the same stands in one position for the purpose of retracting said latch,

by only one of said keys to shift said lever to a different said key con- Q position to prevent the retraction of said latch, with means interposed between. said key controlled means and said lever to transformer to the latter by the use of said last mentioned key, and with means for limiting the degree of rotation of said key controlled means when the latter is turned by one of said keys. I.

NORMAN B. I-IURD.

V normally shifting said latch-lever to retract I I v operable means said latch, a. hub in said lock case and manually operable from the insideof a door, said hub being movable to shift and dog said" latch lever and dog said latch, said roll-back J being operable by an emergency key to shift said hub to undog said latch lever andlatch.

12; In a lock, a lock case, a latch, a latch lever pivoted on the case for actuating said latch, said latch lever gagement with a part of said latch for dogging the same, and means operable from the indoor side of the lock for moving lever to a latch dogging position.

13. In a look, a lock case, lever for actuating saidlatch, a hub manually operable from the inside of the door for moving said latch lever into position'to deadlock said latch, key operable means, said hub having means to for shifting said hub to cause said latch to be positioned in the dead-locking position and in normal position.

14.. In a door look, a case,

having a part for .en-

a latch, a latch i a latch, manual said latch I latch retracting means at the outdoor side of said lock, stop work mechanism for said means, a combined latchactuating and doggmg lever pivoted to said case, a key controlled means operable by either one of two different keys for swinging saidlever when the same stands in one position for the purpose of retracting said latch, said key controlled means being operable by only one of said keys to shift said lever to a difierent position to prevent the retraction ofsaid latch,

ico

ios

said lever when 

